OBD Guide
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P163C

Secondary Generator Field Terminal Circuit Low

P163C is an OBD-II diagnostic trouble code meaning: Secondary Generator Field Terminal Circuit Low. Common causes: open circuit in the generator excitation circuit, poor contact in the generator connectors. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • Dashboard lights flickering or dimming
  • Problems starting the engine
  • Low Battery Warning
  • Unstable operation of electrical components
  • The generator does not charge the battery

Causes

  • Open circuit in the generator excitation circuit
  • Poor contact in the generator connectors
  • Generator malfunction
  • Wiring harness damage
  • Problems with the ECM (engine control module)

How to Fix

  1. Check the integrity of the generator excitation circuit
  2. Inspect and clean generator contacts and connectors
  3. Check generator output voltage
  4. Replace the generator if necessary
  5. Check ECM for errors

Related codes

P0620P062FP065A

FAQ

What does the P163C code mean?

P163C is an OBD-II diagnostic trouble code that indicates: Secondary Generator Field Terminal Circuit Low

What causes a P163C error code?

The most common causes of P163C include: Open circuit in the generator excitation circuit; Poor contact in the generator connectors; Generator malfunction; Wiring harness damage.

How do I fix a P163C diagnostic trouble code?

To fix P163C: Check the integrity of the generator excitation circuit. Inspect and clean generator contacts and connectors. Check generator output voltage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P163C?

Limited driving only, diagnose soon

How much does it cost to fix P163C?

The estimated repair cost for P163C is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat